Pseudohypoparathyroidism. Short metacarpals (esp. the 4th and 5th) are characteristic. Other signs include a round face, short stature and an IQ below average.

By the way, apparently pseudopseudohypoparathyroidism also exists; then the signs are identical, but biochemistry is normal (in pseudohypoparathyroidism: low calcium, high PTH and elevated or normal alk. phos.).